DETENTE DE JOULE THOMSON PDF

The gas—liquid coexistence curve is shown by the blue line, terminating at the critical point the solid blue circle. The dashed lines demarcates the regions where N2 is neither a supercritical fluid, a liquid, nor a gas. This coefficient may be either positive corresponding to cooling or negative heating ; the regions where each occurs for molecular nitrogen, N2, are shown in the figure. Note that most conditions in the figure correspond to N2 being a supercritical fluid , where it has some properties of a gas and some of a liquid, but can not be really described as being either.

Author:Vudogis Zulkisho
Country:Nigeria
Language:English (Spanish)
Genre:History
Published (Last):4 March 2010
Pages:494
PDF File Size:12.38 Mb
ePub File Size:6.4 Mb
ISBN:996-2-63848-607-4
Downloads:63234
Price:Free* [*Free Regsitration Required]
Uploader:Yolkis



The gas—liquid coexistence curve is shown by the blue line, terminating at the critical point the solid blue circle. The dashed lines demarcates the regions where N2 is neither a supercritical fluid, a liquid, nor a gas. This coefficient may be either positive corresponding to cooling or negative heating ; the regions where each occurs for molecular nitrogen, N2, are shown in the figure.

Note that most conditions in the figure correspond to N2 being a supercritical fluid , where it has some properties of a gas and some of a liquid, but can not be really described as being either. The coefficient is negative at both very high and very low temperatures; at very high pressure it is negative at all temperatures.

The maximum inversion temperature K for N2 [10] occurs as zero pressure is approached. At temperatures below the gas-liquid coexistence curve , N2 condenses to form a liquid and the coefficient again becomes negative. Thus, for N2 gas below K, a Joule—Thomson expansion can be used to cool the gas until liquid N2 forms.

Physical mechanism[ edit ] There are two factors that can change the temperature of a fluid during an adiabatic expansion: a change in internal energy or the conversion between potential and kinetic internal energy.

Temperature is the measure of thermal kinetic energy energy associated with molecular motion ; so a change in temperature indicates a change in thermal kinetic energy. The internal energy is the sum of thermal kinetic energy and thermal potential energy.

This is what happens in a Joule—Thomson expansion and can produce larger heating or cooling than observed in a free expansion. In a Joule—Thomson expansion the enthalpy remains constant. The enthalpy, H.

REBNY LEASE PDF

Joule–Thomson effect

.

LUTOSLAWSKI ALBUM FOR THE YOUNG PDF

Effet Joule-Thomson

.

Related Articles